Eobeet m



(No Model.)

R. M. JOHNSON.

. 00m: Box.

. Patented Feb.27,1883.

WITNESSES:

UNITED STATES PATENT OFFICE.

ROBERT M. JOHNSON, OF HAINESPORT, NEY'V. JERSEY.

ooRE-Box.

SPECIFICATION forming part of Letters Patent No. 273,095, dated February27, 1883.

Application filed November 22, 1882. (No model.)

To all whom it may concern Be it known that I, ROBERT M. JOHNSON, acitizen of the United States, residingat Hainesport,iu the county ofBurlington, State of New Jersey, have invented a new and usefulImprovement in Gore-Boxes, which improvement is fully set forth in thefollowing specification and accompanying drawings, in which- Figure l isa top or plan view of the drag and spindle of the core-box embodying myinvention. Fig. 2 is a longitudinal vertical section of the drag andcope in line 00 :20, Fig. 1, with the end supports employed. Fig. 3 is atransverse section in line y y, Fig. 2. Fig. 4: is an end view, partlybroken away.

Similar letters of reference indicate corresponding parts in the severalfigures.

My invention relates to improvements in core-boxes; and it consistspartly in providing a core-box formed of wood with a sheetmetallinin g,whereby it is rendered more durable and adapted to produce smooth andmore uniform cores, and the box is not liableto be cut or injured on itsinner face.

It also consists in providing a core-box with shoulder-pieces, ashereinafter set forth.

It also consists in constructing the core-spindle of detachable parts,which are connected together substantially as hereinafter set forth.

Referring to the drawings, A represents the drag, and B the cope, of thecore-box, both formedlof wood. On. the inner face of each part A B is adepression, a, corresponding to one-half of the diameter of a core formaking pipe, a deeper depression, b, corresponding to one-half of thediameter of the portion of the core for the bell of the pipe, and asomewhat similar depression, 0, corresponding to onehalf of the diameterof the portion of the core for a branch of said pipe. The face of eachdepression is lined with sheet metal, as at a, and at the place ofjunction of the depressions c b is secured a semi-cylindrical piece, 0,of cast or wroughtiron, and at the place of junction of the depressionsa c is secured a semicylindrical piece, D, of cast or wrought iron, theface of each piece being fiush with the depression c, thus forming theshoulder of the core at the junction of the main length of the pipe withthe bell and branch, respectively.

E represents the spindle, which is formed of a tube, 0?, for the core ofthe main length and bell'of the pipe, and a tube, 0, connected angularlywith said tube d, for the core of the branch, the walls of the spindlebeing perforated. The spindle is placed on the drag and the cope fittedin position thereover, the cope and drag thenbeing latched or otherwisesecured together. The ends of the tube (1 are now supported bycylindrical blocks F, preferably of sectional form, introduced intoopposite ends of the box through the openings formed by the depressionsa b. The box is then turned, placing the branch portion upright, andsand rammed around the tube 6 and turned on one end-say the one shown ontheleft hand of the drawings-and rested on the flanges of the blocks F,said flanges also preventing loss of sand at the bottom. The opposite orupper block is removed and sand rammed in the opening formed by thedepressions b, around the tube d, joining the sand at the middle ofsaidtube. The box is carefully inverted, and the block heretofore belowand now above is removed, thus uncovering the openingformed by thedepressions a, and sand is then rammed into said opening around theremaining portion of the tube d, the sand joining that previously rammedaround the tube. The drag and cope are now unfastened and the cope isremoved, whereby the core as formed is exposed and may be withdrawn fromthe drag.

It will be seen that in ramming the sand the lining a is notinj ured bysuch operation, whereby the faees of the depressions are not out ordefaced, thus tending to increase the durability of the box andproducing smooth and uniform cores. The pieces 0 D form sharp andwell-defined shoulders for the respective parts of the cores, it beingevident that said pieces can be properly shaped for their respectivepurposes and conveniently applied in position at places where thelinings a, if employed, would be impracticable, said linings terminatingwhen they reach said pieces. j

The tubes or'parts d e of the spindle are connected as follows: Thewalls of the opening of the tube d, into which the end of the middleportion of the tube d. The box is next tube 0 is fitted, arecontracted,formingathroat, I broken, said tubes may be readily drawnfrom 20 f, on the back of which Walls abuts the head G of a rod, H, saidhead being of-T shape, and said rod passing through the tube 6, and

has its outer end threaded for the engagement of a nut, J, whichtightens against a bearingpiece, K, in which is an opening for thepassage of the rod H,and which rests against the outer end of the tube0.

It will be seen that when the head G extends at a right angle to thethroat fand the nut J is tightened the tubes d e are pressed firmlytogether and securely connected as one. After the core is formed and thecasting accomplished the nut J is unscrewed and the rod H rotated ahalf-turn, whereby the head G is disconnected from the tube (1 andpasses through the throatf, the two tubes (1 0 thus being separated, andas the said covering may be readily the casting.

Having thus described my invention, What I claim as new, and desire tosecure by Letters Patent, is-- '1. A core-box formed of wood, havingasheetrnetal lining, substantially as and for the purpose set forth.

2. A core-box having linings and shoulderpieces, substantially as andfor the purpose set forth.

3. The core-box spindle formed of parts united by a rod or bolt and anut, said rod or bolt having a T-head, substantially as and for thepurpose set forth.

ROBERT M. JOHNSON.

Vitnesses:

JOHN A. WIEDERSHEIM, A. P. GRANT.

